How to have my first time sex with least pain as possible

Patient: I’m a virgin trying to have sex with my boyfriend, but whenever he tries to penetrate it hurts alot even though im very lubricated, i just cant relax and i dont know why. we tried everything to make it more comfortable before penetration, but when he actually tries to penetrate it just hurts too much that i reject him, is there any way at all to help me not have pain at all?